Granted Patent
Utility
US 4,912,929 · App. 07/389,162
Variable gas spring for matching power output from FPSE to load of refrigerant compressor
Inventors:
Gong Chen, William T. Beale
Patented Case
View Patent ↗
Granted: Apr 3, 1990
Filed: Aug 3, 1989
Inventors
Gong Chen
William T. Beale
Assignee (at issue)
SUNPOWER CORPORATION
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.